发明申请
- 专利标题: OPTICAL DEVICE AND METHOD OF CONTROLLING THE SAME
- 专利标题(中): 光学装置及其控制方法
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申请号: US12174948申请日: 2008-07-17
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公开(公告)号: US20090021238A1公开(公告)日: 2009-01-22
- 发明人: Tsutomu ISHIKAWA , Toyotoshi MACHIDA , Hirokazu TANAKA
- 申请人: Tsutomu ISHIKAWA , Toyotoshi MACHIDA , Hirokazu TANAKA
- 申请人地址: JP Yamanashi
- 专利权人: EUDYNA DEVICES INC.
- 当前专利权人: EUDYNA DEVICES INC.
- 当前专利权人地址: JP Yamanashi
- 优先权: JP2007-188879 20070719; JP2008-179731 20080710
- 主分类号: G01R1/44
- IPC分类号: G01R1/44 ; G01R23/04 ; H01S3/04
摘要:
An optical device includes an optical element, a detector and a controller. The optical element has an optical waveguide. Refractive index of the optical waveguide is controlled by a heater. A temperature of the optical element is controlled by a temperature control device. The detector detects a current flowing in the heater and/or a voltage applied to the heater. The controller controls an electrical power provided to the heater so as to be kept constant according to the detection result of the detector.
公开/授权文献
- US07812594B2 Optical device and method of controlling the same 公开/授权日:2010-10-12
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